With the HD-DVD, I wasn't able to play my movie on my non-HDCP HD monitor. Not being able to play a movie that I have paid for, because some executive in Hollywood decided I cannot, made me mad...Not exactly the malicious, devious hacker the MPAA is undoubtedly going to portray him as.
After the HD-DVD crack, I realized that things where "unbalanced" by having just one format cracked, so I did Blu-ray too.
Link. (Via arstechnica)